Magnetically-operated valve



c c HANSEN ET AL MAGNETICALLY OPERATED VALVE Filed Oct. 3. 1921 Aug. 241.926.

Patented Aug, 24, 1926.

UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN AND HERBERT V. HANSEN, OF FORES'I PARK, ILLINOIS, AS-

SIGNORS TO REFRIGERATING SPECIALTIES COMPANY. OF CHICAGO, ILLINOIS, A.

CORPORATION OF ILLINOIS.

MAGNETICALLY-OPERATED VALVE.

Application filed October 3, 1921. Serial No. 505,149.

The invention relates to controlling mechanism for valves. In valves forcertain classes of work, such as those used for controlling the deliveryof refrigerant and condensing Water in refrigerating systems, it isdesirable to hold the valve on its seat by pressure of a spring and alsoby pressure of the fluid.

The object of the invention is to provide magnetically operatedmechanism for opening the valve against the force of the closing springand the fluid pressure on the valve and this object is attained byproviding a hammer armature and a connection which will impart a hammerblow to the valve-stem, of suflicient force to overcome the spring andfluid pressure against the valve and which may be hel open magneticallyafter the hammer blow has been imparted to the valve.

The invention consists in the several novel features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a view, partly in section and partly inelevation, of mechanism embodying the invention. Fig. 2 is a frontelevation.

The invention is exemplified in connection with a valve comprising acasing 4: having an inlet 5 for fluid under pressure therein and anoutlet 6 for fluid, a wall 7 formed with a duct 9 between the inlet andoutlet and formed on its underside with a valveseat 8. A val e 10adapted to close against seat 8 is provided with'a stem 11 which isguided in a plug 12 and a stem 13 which extends upwardly through apacking box 14 provided at the upper end of the casing. A spring 15 inplug12 is adapted to close the valve. The valve casing 4c is secured ina bracket 15 which is bolted to a suitable back-board 16. This valveexemplifies one which is normally closed by a spring and which, whenclosed, is additionally held against its seat by fluid under pressure.

The mechanism for opening the valve comprises a helix 17 which issuitably secured by bolts 18 which pass through a head 19 at the frontof the helix into a bracket 20 which is suitably secured tothe backboard16. A suitable magnet core 21 is provided in the helix. An armature 22,adapted to be influenced by the core 21, is secured to the hammer lever23 which is heavily weighted and is pivoted, at 24, to a lug 25projecting forwardly from the bracket 20. The lever comprises a pendantarm 26 to the lower end of which is pivoted a link 27 for operating atoggle linkage. Said linkage comprises a link 28, the upper end of whichis pivoted, at 29, to a. lug 3O projecting forwardly from the bracket 20and the lower end of said link is pivoted, at 31, to the upper end of alink 32, the lower end of which is pivoted, as at 33, to a slide 34.which is mounted in a boss formed on the upper portion of the bracket 15in which the valve is mounted. Slide 34 comprises a metallic shell 36, abody 37 fixed in said shell and formed of bakelite or othernon-conducting material. Pivot 33 is held in a lug 39 which isscrew-threaded into the body 37 of the slide 34. An abutment orhammer'lO is screwthreaded into the lower end of the body 37 and isadapted to strike the upper end of the valve stem 13 and is normallyspaced therefrom so that when it is operated by the magnet it will notengage the stem until it approaches the end of its stroke. An abutment41 is formed on arm 26 of lever 23 to engage a stop-lug 42 on the lug 30to limit the retractile stroke of the'armature lever 23.

Normally the valve 10 is closed and the helix 17 is deenergized. Whenthe helix is energized, it will magnetize the core 21 which will attractthe armature 22 and operate the lever 23 to operate the toggle linkagethrough link 27. During the initial stroke of the lever 23, there is nosubstantial resistance to the operation of the linkage and, as a result,the lever 23 will acquire suflicient momentum so that when the hammer 10encounters the upper end of stem 13, the latter will impart a hammerblow to the stem with sufficient force to overcome the force of spring15 and of fluid pressure in the inlet 5 of the valve casing. Thearrangement of th toggle linkage is such that its effective movement toshift the valve occurs While it approaches the dead center of thelinkage and, there fore, the linkage will have great leverage inoperating the hammer 40. When the valve is open, the members of thelinkage will be in substantial dead-center relation so that the force ofthe spring 15, which is then being applied to the hammer 40, will besubstantially ineffective to retract the linkage. As a result, theminimum magnetic force in the core 21 will be sufficient to retain thelever 23 and th valveoperating connection in position to retain thevalve open. The lever 23 is weighted at on side of its pivot 24 orformed so that there will be a sufficient preponderance of weight at oneside thereof to cause the lever to retract and release the linkage whenthe helix 17 is deenergized. Lever 23 being weighted, as aforesaid, acuires momentum and force during its initial movement to impart a quickmovement to the hammer 40 so that it will, in turn, impart a blow to thevalve stem.

The invention exemplifies valve-operating mechanism which operates asprin r closed valve by a hammer blow; in whic the toggle linkage isused to provide an effective leverage for opening the valve, and inwhich minimum magnetic force is required to retain the valve-operatingconnection in position to hold the valve open.

The invention is-not to be understood as restricted to the details setforth, since these may be modified within the scope of the appendedclaims, without departing from the spirit and scope of the invention.

Having thus described the invention what we claim as new and desire tosecure by Letters Patent, is

l. The combination with a valve casing and a normally closed valvetherein of mech anism for opening the valve comprising anelectro-magnet, a pivoted weighted lever to which the magnet armature isrigidly secured, and means operated by the lever to impart a hammer blowto the valve.

2. The combination with a valve casing and a normally closed valvetherein of mechanism for opening the valve comprising an electro-magnet,and a pivoted weighted lever to which the, magnetarmature is rigidlysecured, and means operated by the lever to impart a hammer blow to thevalve, said lever being pivoted tobe retracted by gravity.

3. The combination with a valve casing and a valve therein of mechanismfor shifting the valve comprising an electro-magnet, a pivoted weightedlever to which the magnet armature is rigidly secured, and a togglelinkage, operative by said lever to impart a hammer blow to the valve.

4. The combinationwith a valve casing and a normally closed valvetherein of mechanism for shifting the valve comprising anelectro-magnet, a toggle linkage held in substantially dead-centerrelation when the valve is open, and a pivoted weighted lever operableby the magnet, connected to oper-- 5. The combination with a valvecasing and a normally closed valve therein of mechanism for opening thevalve comprising an electro-magnet, a slidable hammer to operate thevalve, a toggle linkage, and a pivoted weighted lever operable by themagnet to operate the linkage to impart a blow to the hammer.

6'. The combination with a valve casing and a valve therein movablebetween two predetermined points, of mechanism for shifting the valvefrom one point to the other comprising an electro-magnet, and a togglelinkage comprising a plurality of serially connected links operativelyconnected to the -armature of the magnet, one end of the linkage beingfixedly pivoted and the other end being applied to operate the valve,

said linkage being adapted to be operated by the magnet when it isenergizedto impart a hammer blow to shift the valve to said other point.

7. The combination with a valve casing and .a valve therein, ofmechanism for shifting the valve comprising an electro-magnet, and atoggle linkage comprising a plurality of serially connected linksoperatively connected to the armature of the magnet, one end of saidlinkage being applied to operate the valve, said linkage being adaptedto impart a hammer blow to the'valve when the magnet is energized andbeing in substantially dead-center relation when the valve is 0 en.

8. The combination with a valve casing and a valve movably mountedtherein, of mechanism for shiftin the valve comprising anelectro-magnet', an a toggle linkage comprising a; plurality of seriallyconnected links operatively connected to the armature of the magnet, oneend of thelinkage being fixedly pivoted and the other end being appliedto operate the valve, said linkage be-- ing adapted to be operated bythe magnet when it is energized to impart a hammer blow to shift thevalve, said linkage being in substantially dead center relation when itis in its operative position.

9. The combination with and a valve movable therein, of mechanism forshifting the valve comprising an electromagnet, and a toggle linkagecomprising a pair of links having their inner ends pivoted to eachother, one of said links being operatively connected to the armature ofthe magnet and having its outer end fixedly pivoted, the other linkhaving its outer end movable and applied to shift the valve, saidlinkage being adapted to be operated by the magnet when it is energized,to impart a hammer blow to shift the valve.

CHARLES C. HANSEN. HERBERT V. HANSEN.

a' valve casing,

